159091417 has 2 divisors, whose sum is σ = 159091418. Its totient is φ = 159091416.

The previous prime is 159091403. The next prime is 159091447. The reversal of 159091417 is 714190951.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 136328976 + 22762441 = 11676^2 + 4771^2 .

It is an emirp because it is prime and its reverse (714190951) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-159091417 is a prime.

It is not a weakly prime, because it can be changed into another prime (159091447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79545708 + 79545709.

It is an arithmetic number, because the mean of its divisors is an integer number (79545709).

Almost surely, 2^159091417 is an apocalyptic number.

It is an amenable number.

159091417 is a deficient number, since it is larger than the sum of its proper divisors (1).

159091417 is an equidigital number, since it uses as much as digits as its factorization.

159091417 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11340, while the sum is 37.

The square root of 159091417 is about 12613.1446118722. The cubic root of 159091417 is about 541.8539579655.

The spelling of 159091417 in words is "one hundred fifty-nine million, ninety-one thousand, four hundred seventeen".